I think that most people would accept that, if your neighbour knocks on your door and asks to borrow your phone, you can say no but that, if there is some crisis or emergency going on—it is not just that he has lost his keys—he would probably be reasonably justified in saying, “Look, I’m going to push you out of the way so I can use your phone, because people are going to die out here.” In a crisis such as that, it might be reasonable to proceed without consent.